Continuity mistake: Kareem's mom is talking to her coworker about the fact that her son asked for James to pick him up at school. When she mentions that it's not seen as the coolest thing to date a cop, and a white one at that, her friend goes from hand low, to smoking with that hand, to drinking from the cup, in the span of a few words and a couple quick cuts. (00:09:45)
Continuity mistake: The appearance of Grace's house by the front door (to the left of the screen) changes from the time Billy is standing along the road to when he meets his mother half-way. At first, the side of the house is mostly white; it is mostly brown thereafter. The garage area to Billy's left also changes color from brown to white. (00:05:22)
Continuity mistake: Early in the film when Jake gets in his car to head off to pick up his son, his seatbelt is on although there is no sight of him putting it on, then, as he pulls away the seatbelt is off.
Continuity mistake: A large-screen TV was on the wall opposite the staircase when Carol and Victor reached the top. Part of a small high window (above the lamp) could be seen near the top of the TV screen. When the camera shifted to the opposite side of the room, the TV temporarily transformed into a large window with floor-length drapes. (00:48:02)
Continuity mistake: The position of the dead (imposter) security guard's head over the barbell changes. When Gus says, "Jesus, he's dead", the security guard's neck is over the barbell rail, the top of his head is touching the floor, and his face is toward the front of the screen. When the camera goes to the opposite side of the dead guard, his head and neck are raised (and apparently no longer being supported by the barbell - or anything else). (00:28:28)
Continuity mistake: Near the start during the 1st bank raid, his hands change position while lying down on the ground talking to the guard.
Continuity mistake: Mikey and his friend are smoking the same inch-long joint by the back door which gets passed back and forth - no way they could keep holding/smoking it for that long given how short it was to start with. (00:04:50)
Continuity mistake: The amount/shape/size of the blood/cut on the bridge of Joey's nose varies, as does the obvious presence or absence of blood on the right side of his nose. (00:42:32 - 00:43:50)
Continuity mistake: Fairly early in the film Spenser is beaten pretty badly by four cops which lands him in the hospital for cuts and bruises, many of which are on his forehead and left side of his face. From then on throughout the movie is face is either cut badly or not at all.
Continuity mistake: In the locker room, an adjacent locker is closed then open with a yellow shirt hanging inside. Also, Ali takes a uniform jacket out of the locker Borz said she could use and holds it in front of her while they were talking. When they're almost done, Ali is turned around toward the locker and starts to remove a uniform jacket from her locker (as though this is the first time she was seeing it). (00:10:52 - 00:11:35)
Continuity mistake: Whilst Jung-seok is driving with his family on the first day of the zombie outbreak, after he says "All other roads must be blocked", his sister looks to the left to face her son in the back seat. The shot then cuts to focus on Jung-seok, and the sister can now be seen looking straight forwards out the window. (00:01:45)
Continuity mistake: The kids are in the car with their dad, and despite the best efforts from the youngest, they are reached by his teacher. As the dad starts the "You were killing us" joke, his hand is on/off the steering wheel between shots more than once. (00:07:15)